Electroplating process.



"e UnitedStates; and a tres'id n JerseyfCit in, the county. fQf Hudson and State of ew Jersey,' have--invented a new and Improved 'Electr0platin Proceed: off'w'hich the following 'is .'a fu l clear, and exact description.

' This invention relates to electroplating electrotyping. 4

'1 the preparation of j electrotypes, the

mo ds or cases of wax; or similar material are co' 'ered "with graphite or; black lead; and are usually-treated with a;solution of 5 copper-sulfate a'nd'iron filings. This has theefi'e'etof inereasing the conductivity of the case so that plating almost imme dia t ely uponimmersionin theiplafiing bath. 7 The use, of ,blue stone or" cop er sulfate and; iron 'filin'gshas inany draw acks, chief of which is a tendency tos'cratchthe faceof th1case the undi'ssolv'edpiec'es'of th'e'i'ron egsolution is'exgensive and; very,

dest fictive'm plumbingwen 'it is allowed to run ofithrou'gh'the wxstepipes. The object of; lie-invention is to pi odu'ce an economical; which-will facilitate the rapid 'eletyplfltingtof 'the case, whileavoiding the). efeets,}=relat ively highcost and disadvanta referred j to; above; the g m m1 'Pn p ses e-p m mo we eat -'plate's ot fll'ectrotypes; 1

The invention c fsts ii -the process, to. i

' .hereina t'an par fticiz larly setl im's e if; a1 form is pret fcasgithen re' H "cilia "of f$ 'lead and is then; sprayed ,w ith Water through a rose nozzle, which removes the fei'r fro'm, the leaded faceof thefc'al fflt.iscustdinaryqt this point to treat-the" case-with a" solution of copper suifate .-.-referred.to4 above. In' practj'cing my 'proeess atethispoint, I iminerse the case. in a '801-1ition of-dpyrogalho nerd, which is an or anie'acidan an oxygen acid of the ca rbocyc ic Series. I prefer to use pyrogallic acidfthough 1'; they use tannic acid, gallotannic' 8cid' )l.:g &1 l1' i11d for th'e same Th -mi is p i 1 5 by .tlie as described int e acid Application and J un'e 9,; 90a." ser al-11o. secede.

""tliei'face ofithezcase with a The solution ofthe -acid used Y summ n f tt 2mm. Patented Qt; 25 1916.

{contains ahout SO grains to the gallon of ',;water.- After'treating the'case with the acid' I -fspra it again with the nozzle, to

I rinse the acid from the face of the, lead.

The ca is then placed inlthe plating bath.

'It'i's ve'r important that'the cases should be thoroug y washed, sothat all; of the acid or =1ts' pro ucts will beremoved. ,Ifthis is not accomplished, the acid remains in the recesses of type, increasingthe resistance in its locality; this produces spots and destro'ysthe. uniformity of.- the resulting late.

it is the effect of the treatment with th-eiacid which is desired rather than the presence of ftlmes by ink which a erefs to the type after For this reason it should be understoo that the acid itself. In this connection it should taking prboflsheets fromlthe' form. I beheve'; also, that the tendencytoform spots is a avatedby the presenceof lighter oils v wi i h come to the surface of the wax under the great pressure .to which the cases are I subjected. "The acid dissolves these sub 'stanceswhenfia'pplied to the"lcase,-'and the surface of the'casebecomes'. thorou hl'y clean when-rinsed" with water as ldes'cri'ed. Thje faction of the acid appears-to be' to prevent thelafpgearancelon the surface .ofthe case'ofbubb e of occluded gas,- and 'itl-is thought that it has agcertain advantageous actlonuponthe lighter foil's which may- .hebrought to the surface ofthe wax by the pressure. -What'I claim and desire tosecurel Letp I ters Patent is:

. 1, 'T.he process whichconsistsin treatin an"or ganic acid solut' on, removing the said the graph1tecoverin for a type moldfWit 21? organic ec1d, an electro.-p lating" there- I acid solution thereafter,'-andele'et-ro-pla-ting.

. 3. The process which consists in coveringailiold with graphiteg wettingzsai dgraphite with an drganic-. acid.Solution, rinsln said case to remove 'sa-1d'soliit10n;--'and--'e ectr r' p i q he fl r ii e --proeess"of-iprep r; [a type case which consists"; -I

gra hiife," wetting ith-an'oxy'g'en' acji rinsing 'tow'remove the acid-{and eleetro-platingjthereaftefl jt ecasex-with' 5. Thej procejs's'zof' lireparing a type' case which consists in covering the case with graphite, wetting said caseewith an acid of the carbo-cyclic series, rinsing, and electroplzanti1il thereafter.

6, e process which comprises wetting a type-case with an 'acid of the carbocyclic series, and electro-plating the case thereafter.

In testimony whereof I have signed my name to this specification in the presence of 10 two subscribing witnesses. v

FRANCIS J. MGELHONR Vitnesses F. D. AMMEN, Jxo. M, BITTER. 

